1 files changed, 29 insertions, 11 deletions

diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index ffe6960cb30a..4a2ac0c8cef9 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -1685,6 +1685,7 @@ int qeth_send_control_data(struct qeth_card *card, int len,
         unsigned long flags;
         struct qeth_reply *reply = NULL;
         unsigned long timeout;
+        struct qeth_ipa_cmd *cmd;
 
         QETH_DBF_TEXT(TRACE, 2, "sendctl");
 
@@ -1731,17 +1732,34 @@ int qeth_send_control_data(struct qeth_card *card, int len,
                 wake_up(&card->wait_q);
                 return rc;
         }
-        while (!atomic_read(&reply->received)) {
-                if (time_after(jiffies, timeout)) {
-                        spin_lock_irqsave(&reply->card->lock, flags);
-                        list_del_init(&reply->list);
-                        spin_unlock_irqrestore(&reply->card->lock, flags);
-                        reply->rc = -ETIME;
-                        atomic_inc(&reply->received);
-                        wake_up(&reply->wait_q);
-                }
-                cpu_relax();
-        };
+
+        /* we have only one long running ipassist, since we can ensure
+           process context of this command we can sleep */
+        cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
+        if ((cmd->hdr.command == IPA_CMD_SETIP) &&
+            (cmd->hdr.prot_version == QETH_PROT_IPV4)) {
+                if (!wait_event_timeout(reply->wait_q,
+                    atomic_read(&reply->received), timeout))
+                        goto time_err;
+        } else {
+                while (!atomic_read(&reply->received)) {
+                        if (time_after(jiffies, timeout))
+                                goto time_err;
+                        cpu_relax();
+                };
+        }
+
+        rc = reply->rc;
+        qeth_put_reply(reply);
+        return rc;
+
+time_err:
+        spin_lock_irqsave(&reply->card->lock, flags);
+        list_del_init(&reply->list);
+        spin_unlock_irqrestore(&reply->card->lock, flags);
+        reply->rc = -ETIME;
+        atomic_inc(&reply->received);
+        wake_up(&reply->wait_q);
         rc = reply->rc;
         qeth_put_reply(reply);
         return rc;